SEC Form 4
DexCom, Inc. (DXCM) insider trading
In the 12 months to Oct 23, 2026, 9 DXCM insiders reported open-market sales of $12.8M across 25 filings; one president & COO bought $1.0M.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $12.8M
- 25 filings · 9 insiders
- Open-market purchases
- $1.0M
- 1 filing · Jacob Steven Leach, President & COO
- Pre-arranged sales (10b5-1)
- 25 of 25
- All $12.8M sold was pre-arranged
Who traded DXCM, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
DXCM daily close from Oct 23, 2025 to Oct 22, 2026, between $54.84 and $92.34, last $78.32. 25 sale and 1 purchase filings by 10 insiders, marked at their filing dates. Kevin R. Sayer, Executive Chair: sold $8.3M across 4 filings, first filed May 26, 2026, last Aug 24, 2026. Michael Jon Brown, EVP, Chief Legal Officer → EVP Chief Legal Compliance Off: sold $1.0M across 8 filings, first filed Mar 18, 2026, last Oct 19, 2026. Jacob Steven Leach, President & COO: bought $1.0M across 1 filing, first filed Nov 10, 2025, last Nov 10, 2025. Jon Coleman, EVP, Chief Commercial Officer: sold $722.6K across 1 filing, first filed Jun 5, 2026, last Jun 5, 2026. Nicholas Augustinos, Director: sold $679.8K across 1 filing, first filed Sep 16, 2026, last Sep 16, 2026. Mark G. Foletta, Director: sold $627.2K across 2 filings, first filed Jun 17, 2026, last Aug 4, 2026. 4 others: sold $1.4M across 9 filings, first filed Nov 10, 2025, last Sep 30, 2026.
Largest mark · tap a row for others
Kevin R. Sayer · Executive Chair
Sale $2,408,242
26,756 shares at $90.01 avg
Filed Aug 24, 2026 · traded Aug 20
Pre-arranged (10b5-1) · close on filing date $91.06
Kevin R. Sayer · Executive Chair
Executive Chair
$8.3M soldMichael Jon Brown · EVP, Chief Legal Officer → EVP Chief Legal Compliance Off
EVP, Chief Legal Officer → EVP Chief Legal Compliance Off
$1.0M soldJacob Steven Leach · President & COO
President & COO
$1.0M boughtJon Coleman · EVP, Chief Commercial Officer
EVP, Chief Commercial Officer
$722.6K soldNicholas Augustinos · Director
Director
$679.8K soldMark G. Foletta · Director
Director
$627.2K sold4 others
Combined, one mark per week
$1.4M soldHas DexCom, Inc.'s CEO sold stock?
No. Jacob Steven Leach (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
26 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Kevin R. Sayer | Executive Chair | $8.3M | — | 4 | 100% of sales | |
| Michael Jon Brown | EVP, Chief Legal Officer → EVP Chief Legal Compliance Off | $1.0M | — | 8 | 100% of sales | |
| Jacob Steven Leach | President & COO | — | $1.0M | 1 | — | |
| Jon Coleman | EVP, Chief Commercial Officer | $722.6K | — | 1 | 100% of sales | |
| Nicholas Augustinos | Director | $679.8K | — | 1 | 100% of sales | |
| Mark G. Foletta | Director | $627.2K | — | 2 | 100% of sales | |
| Sadie Stern | EVP Chief People & Culture Off | $447.6K | — | 2 | 100% of sales | |
| Richard Alexander Collins | Director | $389.4K | — | 2 | 100% of sales | |
| Jereme M. Sylvain | EVP, Chief Financal Officer | $302.9K | — | 1 | 100% of sales | |
| Bridgette P. Heller | Director | $277.7K | — | 4 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Michael Jon Brown EVP Chief Legal Compliance Off | SalePre-arranged (10b5-1) | 1,700 | $85.48 | $145.3K | 98,185 | |
traded | Sadie Stern EVP Chief People & Culture Off | SalePre-arranged (10b5-1) | 2,565 | $86.15 | $221.0K | 123,478 | |
traded | Michael Jon Brown EVP Chief Legal Compliance Off | SalePre-arranged (10b5-1) | 1,700 | $84.04 | $142.9K | 99,885 | |
traded | Nicholas Augustinos Director | SalePre-arranged (10b5-1) | 8,089 | $84.04 | $679.8K | 29,293 | |
traded | Jereme M. Sylvain EVP, Chief Financal Officer | SalePre-arranged (10b5-1) | 3,638 | $83.27 | $302.9K | 146,828 | |
traded | Sadie Stern EVP Chief People & Culture Off | SalePre-arranged (10b5-1) | 2,565 | $88.37 | $226.7K | 126,043 | |
traded | Kevin R. Sayer Executive Chair | SalePre-arranged (10b5-1) | 26,756 | $90.01 | $2.4M | 302,214 | |
traded | Michael Jon Brown EVP Chief Legal Compliance Off | SalePre-arranged (10b5-1) | 1,700 | $91.93 | $156.3K | 102,953 | |
traded | Bridgette P. Heller Director | SalePre-arranged (10b5-1) | 1,012 | $88.29 | $89.3K | 29,570 | |
traded | Mark G. Foletta Director | SalePre-arranged (10b5-1) | 4,000 | $82.66 | $330.6K | 48,852 | |
traded | Kevin R. Sayer Executive Chair | SalePre-arranged (10b5-1) | 26,756 | $76.32 | $2.0M | 328,970 | |
traded | Michael Jon Brown EVP Chief Legal Compliance Off | SalePre-arranged (10b5-1) | 1,700 | $74.42 | $126.5K | 104,653 | |
traded | Kevin R. Sayer Executive Chair | SalePre-arranged (10b5-1) | 26,756 | $72.00 | $1.9M | 355,726 | |
traded | Mark G. Foletta Director | SalePre-arranged (10b5-1) | 4,000 | $74.13 | $296.5K | 52,852 | |
traded | Michael Jon Brown EVP Chief Legal Compliance Off | SalePre-arranged (10b5-1) | 1,700 | $75.55 | $128.4K | 106,353 | |
traded | Jon Coleman EVP, Chief Commercial Officer | SalePre-arranged (10b5-1) | 9,823 | $73.56 | $722.6K | 95,450 | |
traded | Kevin R. Sayer Executive Chair | SalePre-arranged (10b5-1) | 26,759 | $72.00 | $1.9M | 382,482 | |
traded | Michael Jon Brown EVP, Chief Legal Officer | SalePre-arranged (10b5-1) | 1,700 | $59.91 | $101.8K | 109,504 | |
traded | Bridgette P. Heller Director | SalePre-arranged (10b5-1) | 1,012 | $60.01 | $60.7K | 25,007 | |
traded | Michael Jon Brown EVP, Chief Legal Officer | SalePre-arranged (10b5-1) | 1,700 | $63.04 | $107.2K | 111,204 | |
traded | Michael Jon Brown EVP, Chief Legal Officer | SalePre-arranged (10b5-1) | 1,700 | $64.85 | $110.2K | 112,904 | |
traded | Bridgette P. Heller Director | SalePre-arranged (10b5-1) | 1,012 | $68.01 | $68.8K | 26,019 | |
traded | Richard Alexander Collins Director | SalePre-arranged (10b5-1) | 2,906 | $59.05 | $171.6K | 35,088 | |
traded | Bridgette P. Heller Director | SalePre-arranged (10b5-1) | 1,012 | $58.07 | $58.8K | 27,031 | |
traded | Richard Alexander Collins Director | SalePre-arranged (10b5-1) | 3,948 | $55.17 | $217.8K | 37,994 | |
traded | Jacob Steven Leach President & COO | Purchase | 18,200 | $55.04 | $1.0M | 329,197 |
GET /stocks/filings/vX/form-4?tickers=DXCM&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"DXCM"
],
"issuer_cik": "0001093557",
"owner_cik": "0001899922",
"accession_number": "0001093557-26-000183",
"form_type": "4",
"filing_date": "2026-10-19",
"period_of_report": "2026-10-15",
"issuer_name": "DEXCOM INC",
"issuer_trading_symbol": "DXCM",
"owner_name": "Brown Michael Jon",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "EVP Chief Legal Compliance Off",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-15",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1700,
"transaction_price_per_share": 85.48,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 98185,
"transaction_value": 145316,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "On November 26, 2025, Mr. Brown adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Brown. The shares set forth above were sold pursuant to the 10b5- 1 Plan."
},
{
"id": "F2",
"description": "Included in this number are 71,903 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 5,699 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027."
}
]
},
{
"tickers": [
"DXCM"
],
"issuer_cik": "0001093557",
"owner_cik": "0001797971",
"accession_number": "0001093557-26-000181",
"form_type": "4",
"filing_date": "2026-09-30",
"period_of_report": "2026-09-28",
"issuer_name": "DEXCOM INC",
"issuer_trading_symbol": "DXCM",
"owner_name": "Stern Sadie",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "EVP Chief People & Culture Off",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-28",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 2565,
"transaction_price_per_share": 86.15,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 123478,
"transaction_value": 220974.75000000003,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "On May 28, 2026, Ms. Stern adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Stern. The shares set forth above were sold pursuant to the 10b5-1 Plan."
},
{
"id": "F2",
"description": "Included in this number are 71,903 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 5,699 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 52 records
- Tax withholding19 records
- Grants and awards24 records
- Gifts9 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for DXCM every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Role
- The title on each filing. Someone whose title changed shows more than one.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.